Smart Home Automation Forum

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ESP32 ANALOG_A1 GPIO36 For (Analog Multiplexer: cd74hc4067) to extend "analog input" 1-16

ESP32 ANALOG_A2 GPIO39 analog input 17
ESP32 ANALOG_A3 GPIO34 analog input 18
ESP32 ANALOG_A4 GPIO35 analog input 19

IIC Bus:A

SDA-A:GPIO4
SCL-A:GPIO16

PCF8575:U40 (output 1-16): 100 100 = 0x24
PCF8575:U41 (output 17-32): 100 101 = 0x25

PCF8575:U42 (output 33-38): 100 110 = 0x26

cd74hc4067
S0-A: PCF8575->U42->P10 (output 33)
S1-B: PCF8575->U42->P11 (output 34)
S2-C: PCF8575->U42->P12 (output 35)
S3-D: PCF8575->U42->P13 (output 36)

free LEDs:

LED-D7: PCF8575->U42->P14 (output 37)
LED-D8: PCF8575->U42->P15 (output 38)
-----------------------------------------------------------------------------------

PCF8575:U35 (input 1-16): 100 001 = 0x21
PCF8575:U37 (input 17-32): 100 010 = 0x22

PCF8575:U38 (input 33-48): 100 011 = 0x23
PCF8575:U42 (input 49-58): 100 110 = 0x26

PCF8575->U42->P0 (input 49)
PCF8575->U42->P1 (input 50)
PCF8575->U42->P2 (input 51)
PCF8575->U42->P3 (input 52)
PCF8575->U42->P4 (input 53)
PCF8575->U42->P5 (input 54)
PCF8575->U42->P6 (input 55)
PCF8575->U42->P7 (input 56)
PCF8575->U42->P14 (input 57)
PCF8575->U42->P15 (input 58)

-----------------------------------------------------------------------------------------

PCA9685: address 0x00
-----------------------------------------------------------------------------------------

Button-S1: reset
Button-S2: GPIO0
Button-S3: PCF8575->U42->P14 (input 57)
Button-S4: PCF8575->U42->P15 (input 58)

-------------------------------------------------------------------------------------------

DS18B20/DHT11/DHT21/LED strip -(TP1): GPIO14
DS18B20/DHT11/DHT21/LED strip -(TP2): GPIO5

-------------------------------------------------------------------------------------------

Ethernet (LAN8720) I/O define:

#define ETH_ADDR 0
#define ETH_POWER_PIN -1
#define ETH_MDC_PIN 23
#define ETH_MDIO_PIN 18
#define ETH_TYPE ETH_PHY_LAN8720
#define ETH_CLK_MODE ETH_CLOCK_GPIO17_OUT

-------------------------------------------------------------------------------------------

RS485:
RXD(A): GPIO32
TXD(B): GPIO33

------------------------------------------------------------------------------------------

4G GSM Module / Extend serial port:

RXD: GPIO13
TXD: GPIO15

---------------------------------------------------------------------------------------------

DS3231 RTC module: IIC address 0x68
EEPROM's default I2C address is 0x57

Can gpio05 and gpio14 work at the same time?

I tried on one_wire to define both but accepts one OR the other.

I want dht11 on one pin and DS18b20 on the other.

Do you use KCS firmware or ESPHome?

Esp home.

We need two sensors:

(DS18b20) on Tp1 and dht on tp2.

Can both be used at the same time?

How many on each channel using both channels?

sure, you can use two gpio at the same time.
if you using ESPHome, also support one gpio with multi DS18B20 sensors.

One gpio with many DS18b20
Also the other gpio with many Dht11?

yes, that according to ESPHome, one gpio can work with multi ds18b20 sensors. But one gpio ONLY work with one DHT11 sensor.

I have a DS18b20 on GPIO14 and working. Trying to use a Dht11 on GPIO05.

The code I use (try) is:

#

one_wire:
- platform: gpio
pin: GPIO14
id: one_wire1
- platform: gpio
pin: GPIO05
id: one_wire2

Sensor
- platform: dallas_temp
name: #AIO DS18B20 #1"
update_interval: 10s
one_wire_id: one_wire1

- platform: dht
model: DHT11
one_wire_id: one_wire2
temperature:
name: "Temperature2"
humidity:
name: "Humidity2"
update_interval: 10s

#

The error I get is:

INFO ESPHome 2024.12.4
INFO Reading configuration /config/esphome/aio.yaml...
WARNING GPIO5 is a strapping PIN and should only be used for I/O with care.
Attaching external pullup/down resistors to strapping pins can cause unexpected failures.
See https://esphome.io/guides/faq.html#why-a...pping-pins
Failed config

sensor.dht: [source /config/esphome/aio.yaml:429]

'pin' is a required option for [sensor.dht].
platform: dht
model: DHT11

[one_wire_id] is an invalid option for [sensor.dht]. Please check the indentation.
one_wire_id: one_wire2
temperature:
name: Temperature2
humidity:
name: Humidity2
update_interval: 10s

What am I doing wrong? I am using 3.3v for Dht11. Tried 2 different sensors, both same error.
https://a.aliexpress.com/_EIdTg JK
https://a.aliexpress.com/_EQCKU9Q

(04-14-2025, 07:39 PM)xarouli5 Wrote: [ -> ]I have a DS18b20 on GPIO14 and working. Trying to use a Dht11 on GPIO05.

The code I use (try) is:

Code:
one_wire: - platform: gpio pin: GPIO14 id: one_wire1 - platform: gpio pin: GPIO05 id: one_wire2 Sensor: - platform: dht model: DHT11 one_wire_id: one_wire2 temperature: name: "Temperature2" humidity: name: "Humidity2" update_interval: 10s

The error I get is:

INFO ESPHome 2024.12.4
INFO Reading configuration /config/esphome/aio.yaml...
WARNING GPIO5 is a strapping PIN and should only be used for I/O with care.
Attaching external pullup/down resistors to strapping pins can cause unexpected failures.
See https://esphome.io/guides/faq.html#why-a...pping-pins
Failed config

sensor.dht: [source /config/esphome/aio.yaml:429]

'pin' is a required option for [sensor.dht].
platform: dht
model: DHT11

[one_wire_id] is an invalid option for [sensor.dht]. Please check the indentation.
one_wire_id: one_wire2
temperature:
name: Temperature2
humidity:
name: Humidity2
update_interval: 10s

What am I doing wrong? I am using 3.3v for Dht11. Tried 2 different sensors, both same error.
https://a.aliexpress.com/_EIdTg JK
https://a.aliexpress.com/_EQCKU9Q

you can update your esphome to 2025.3
now the one wire sensor yaml format have changed, you can check with esphome webpage.

For any other looking the same:

The problem was not the version of ESPHome, though I updated had the same error as before.

The code working:

#

one_wire:
- platform: gpio
pin: GPIO14
id: one_wire1
- platform: gpio
pin: GPIO05
id: one_wire2
#no need to define one_wire2 for a reason I don't understand but it works like this. #

Sensor
- platform: dallas_temp
name: #AIO DS18B20 #1"
update_interval: 10s
one_wire_id: one_wire1

- platform: dht
pin: GPIO05
temperature:
name: "Temperature DHT11"
humidity:
name: "Humidity DHT11"
update_interval: 60s

#

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